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JACOB neurones NEWBURYPORT, AssIeNon To Anios L. woonY AND JOSIAH G. ABBOTT, OF BOSTON, MASSACHUSETTS. Letters Patent No. 70,265, elated October 29, 1867.

IMPROVEMENT IN LET-OFF FOR LOOMS.

TO ALL WHOM IT MAY CONCERN:

Beit known that I, .IACoB REMICK, of Newburyport, in the county of Essex, `and State of Massachusetts, .have invented an improved Let-Oh' Motion for Looms, of which the following is a full, clear, and exact descrip` tion, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a perspective view, representing the framework and a portion of the mechanism of-eloom with my improved let-oifmotion applied thereto.

Figure 2 is a rear elevation ofthe same. i y ,e

Figure 3, a section on the line :z: :v of fig. 2. t

The delivery of the yarn from its beam is governed entirely by the tension of the warp, and is effected by the return-motion of the lay after beating up the iilling, the ,forward beat of the lay serving to take up the fabric after being woven.

To provide a means whereby the exact amount of' the warp may be let off, and the degree of itsV tension regulated by v,the action of the loom, is the object of my invention, which consists in conducting the yarn over 1.1 guide or whipntiller, supported in bearings in one end of a bent arm or lever pivoted to the framework, or to standards arisingthcrcfrom, the other end of the lever being pressed in contact with a friction-wheel byaspring when the lay is beating up the filling, thus producing suicient friction to prevent the revolution of the yarnbeem by which thel friction-wheel is operated, the return of the lay increasing the degree of tension4 of the wnrps, and causing the whip-roil to be depressed in its yielding bearings against the resistance of the spring, 'thereby overcoming the pressure of the other end of the lever onthe friction-wheel, und allowing the yarn-beam to he revolved sufficiently to let off the amount of yarn desired. i

To enable others skilled in the art to understand and use my invention, I will proceed to describe the mar ner in which I have carried it out. l

In the said drawings, A is the framework of a loom in suitable bearings a, in which revolves the beam B, around which is wound the yarn, which is lcd over the whip-roll and through the reeds of the lay to the weaving-point, the woven fabric passing in the usual way ovei` the breast-beam G to the take-up roll D. One extremity of the whip-roll turns freely in an open bearing,oc, in the upper end o? of a bent arm or lever, E, pivoted at c to a standard,f, scoured to the framework, the poppositeextremity of the whip-roll being loosely pivotcd to asimilar standard, f. The under side of the lower end g ofthe lever is provided with a pad or cushion, z., which, when the tension ofthe yarn is increased in a manner hereafter to be explained, is pressed down upon the' surface of a drum or friction-wheel, F, by a spring, G, the upper end of which is secured at z'to one end of the lever E, while the lower end of the spring is connected to a. vertical rod, 7c, passing through a stud, H, proa jccting from the framework, and is provided with o. screw-thread, upon which turns a nut, I, for the purpose of regulating the tension of the spring es required.

The connections between the warp-beam B and the friction-wheel F, and the manner in which the friction of the pad it is relieved therefrom, will now be described.

Jis a cog-wheel, secured to the outer end of the warp-beam, which is revolved when the tension of the Warp is increased by the return motion of the lay K, and drives a pinion, L, on the inner end of a short shaft, Z, which carries a cog-whcel, M, on'its outer end, which gears into a pinion, N, (seen dotted -iu hg. 3,) on a stud, m, upon which the friction-wheel F revolves. The lower ends of Athe lay K are pivoted to the framework at'n, the upper cnds of the lay being connected by rods O to the cranks of the'driving-shaft I), by which the necessary vibrations are produced. One end of the drivingrshaft carriesa cog-wheel, Q, which engages with a cog-whe'el, R, ou a shaft, S, to which is secured a disk, T, provided with a groove, o, within which slides a block, p, from v which projects a pin, q, to which is secured one end of a pawl, r, the other end of which actuates e. ratchet-wheel,

U, the sliding block being provided with a. slot and screw, whereby it is made adjustable in its disk T, thus increasing or diminishing the leverage of the pawl 1'. s is a retaining-pawl, for preventing the revolution of the wheel U in the wrong direction. The shaft to which the wheel U is secured carries a pinion, which engages with a cog-wheel on the end of the cloth or take-up roll D. Y

As the crank-shaft P revolves, and the lay K moves forward in the direction of the arrow 4 to beat up the filling at each alternate motion, the actuating-pawl 1' turns the w'he'el U around a distance equal to that between two of its teeth, and through the connections already explained caus'esvth'ev take-up roll D to revolve as required. At the proper moment during the/return of the lay, which moves in the arc of' a circle, the yarnis pressed thereby, and the required amount let oiffrom its beam in the following manner: The increased tension of the yarn causes the whip-roll b to be borne down with its yielding bearings suiicicntly to raise the end g of the bent lever E and its pad'h from off the friction-wheel F against the resistance of the spring G, when, on the friction being removed, the yarn-beam is free to make a partial revolution, the amount of yarn delivered'alt each alternatebeat of the lay being exactly equal to the amount which was just previously taken up, and the tension of the' warps will always be the same 'at the moment the lay is beating up.

Instead of lthe lever E, spring, G, friction-wheel F, etc., being employed at one end only of the whiproll, like mechanism may be employed at both ends of the whip-roll, if preferred.

The intermediate wheel M, with its pinion L, may be dispensed with, and the pinion N, on the same shaft with the friction-wheel F, engage directly with the wheel J on theend of the yarn-beam, without departing from the spirit of my invention; but I prefer the construction first mentioned.

. The portion of the mechanism for regulating the let-oil` maybe reversed, if desired, the whip-roll bengsupported in the lower en d vof the lever E, and the spring G being secured to its upper end, in which ease the yarnbeam would be placed over the whip-roll, and the yarn conducted down under it instead of over it, as herein shown and described. V

` Claim. What I claim as my invention, and desire to secure by Letters Patent, is- The combination of the whip-roll b, in the bent arms or levers E, with the springs G, adjustable rod c, friction-wheels F, and warp-beam B, all constructed and arranged substantially as andl for the purpose set forth.

' JACOB REMICK.`

Witnesses:

SAMUEL ESTES, JOSEPH G. GERRISH. 

